In the following structures, which one is a having staggered conformation with maximum diheldral angle?

HBr adds to alkene in accordance with Markovnikov's rule.

Delocalisation of  electrons in benzene  leads to saturation

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Alkanes, Alkenes, Alkynes, and Aromatics hydrocarbons are the four main hydrocarbons.

Hydrocarbons are organic compounds made of only carbon and hydrogen.